Door-knob alarm



(Model.) A 2 Sheets-Sheet 1.

I' Y W'. F. COOK..

' DUUR KNOB ALRM.

No. 253,008. Patented-Jan. 31,1882.

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(Model.)

W. I'. COOK.

DOOR KNOB ALARM. No. 253,008 Patented Jan. 31,1882.

2 7,11 l 13X y c Flyif O l /UL Tzu/5555: INVENTOR) TTQRNEY YP rrnn *raras l WILLIAM F. COOK, OF IVY MILLS, PENNSYLVANIA.

DOOR-KNOB ALARM.

SPECIFICATION forming part of Letters Patent No. 253,008, dated January 31, 1882.

` Appiicnnon ined october 2G, iesi. (Model.)

To all whom fit may concern: of any suitable material. Within this knob Be it known that I, WILLIAM F. Cook, a citizen of the United States, residing at Ivy Mills, in the county of Delaware and State of Pennsylvania, have invented` certain new and useful Improvements in Door-Knob Alarms, and I do hereby declare the followingto be a full, clear, and exact description ofthe invention, reference bein g had to the accompanying drawings, which form part of this specification, in which- Figure l is a longitudinal vertical section of my invention. Fig. 2 is a transverse section on line a a, Fig. 1. Fig. 3 is a like view on line .fr a2, Fig. l. Fig. 4 is a detail elevation. Fig. 5 is a broken longitudinal section of door knob alarm with gearing or clock-work removed therefrom., Fig. 6 is a plan of a modiiication of my invention, and Fig. 7 is a detail perspective ofthe same.

My invention has for its object to provide a door-knob with internal mechanism, which, when the knob-spindle is turned, will ring an alarm, said mechanism being so arranged that it may be locked to remain inactive on turning such spindle. j

My invention consists in the combination, with a door-knob, ofa clock-work or equivalent alarm mechanism located within such knob and adapted and arranged to be started when the door-knob or knob-spindle is turned.

It consists, further, in the combination, with a door-knob and a clock-work or equivalent alarm mechanism located within the same, of means for setting the alarm, so that it will be started when the knob-spindle is turned, such means serving also to lock the alarm, so that said spindle may be turned without starting the alarm.

It consists, still further, in certain details of construction and combination, hereinafter fully set forth and specifically claimed.

Referring to the accompanying drawings, A is the outer door-knob, which may be of any usual or ordinary construction, B its spindle, and O the inner door-knob. Said knob O is madein two sections, C and C2, one of which (by preference the inner) is a gong, or is made of resonant material, so as to produce an alarm when struck. The other section may be made is a train of clock-work or similar gearing, I), having a hammer, d, which, when the clockwork is released, is caused to strike on the gong O. Said clock-work may be wound up by a key, E, which enters through an opening in the front of the knob O or engages with the barrel d projecting through the same.

F represents a detent which engages with a lug or stop, d2, on the hammer-shaft di. When such detent is moved, as it may be under certain conditions by turning the outerdoor-knob, A, the stop cl2 is released from engagement with thedetent. The gearing will then run and the hammer be caused to strike and sound an alarm. To control the movement of this detent I provide the following arrangement:

G represents a sleeve on the spindle B, located between the knob C and an escutcheon or plate, H, which 'latter is fastened to the door I by screws 7i. The sleeve G has an angular bore or passage, in which the spindle B passes, so that said sleeve and spindle turn together.

K is a slide, which is fastened on the sleeve G by a loose collar or ring, K. the slide are enlarged to form heads 7c k2, respectively. The head kis adapted to titsnugly in and be moved out of a notch, h2, leading out of an annular slot, h3, in the plate H, and' the head 7a2 in like manner lits in a notch, g, leading out of an annular slot, g', in the flange rIhe ends of G of the sleeve G and an opening, c, in the d2, nor will any alarm be rung; butif the slide K be moved outwardly, so as to bring the head 7c into the opening h2, this will cause the head k2 to clear the opening g in sleeve-flange G', said head k2 still remaining in the opening c in the knob O. In this position of the slide the knob C is locked with the escutcheon or plate H, but it is not locked to the sleeve G. Now, on turning the knobspindle B, by rotat IOO ing the outer door-knob the detent F, which is carried on the end ot' said spindle, will be moved; butas the knob C is locked to the escutchcon orplate H,it remains stationarywith its gearing, so that the detent F releases the stop 12, allowing the alarm to start. It follows that to set the device to produce an al'arm when the knob-spindle is turned the slide should be moved outwardly or away from the escutcheen. To set it so that an alarm will not be soundedon turning either door-knob, the slide is moved in the contrary direction-. c., toward the escutcheon-occupying the position shown in Fig. l.

The chief object of my invention is to cause acontinuous alarm, such as usually takes place in an alarm-clock, the sounding ot' the bell con tinning until the alarm is run down; but it can be so arranged that by the turning of the outer knob the alarm may be set oit and bythe return ot' the knob or spindle to its natural position it may be again locked, thus producing only a few rings as often as the knob is turned and allowed to return again to its original position, the principle ot' its action nevertheless remaining the same in both cases, whether it be one continuous alarm or short alarms, until itis run down.

For along alarm the detent may be conibined with a stop, as shown in Fig. 4, so that when the detent is moved from under the stop it will so stay, unless restored to its normal position by turning the knob-spindle back to its original position, which it will require some external force to effect. Unless the detent be so returned, the alarm will continue to be sounded until the gearing has run down.

To ring a short alarm, (or one which will con tinue only while the knob is held is its partlyturned positiom) the detent and stop may be constructed and arranged as shown in Fig. 7, where Fl represents the detent and d2 the hammer-stop. lith this arrangement, when the spindle is in its normal position the detent presses against the side ot' the stop and keeps the alarm locked. By turning the spindle it moves the detent away from the stop and allows the alarm to start. On letting go ofthe knob it and the spindle return automatically to their normal position by the action of the usual spring in the lock, which effects such return. This causes the detent to again press on the stop and to discontinue the alarm.

To allow an alarm to be well sounded the section C2 should be moved slightly away from the section C', so as to avoid contact of their edges and leave an opening for the escape of sound-vibrations. Said sections may be rigidly tixed with their edges some distance apart, as shown in Fig. l; or the slide K may have an extension, K2, as shown in Fig. 5, reaching to and supporting the section C2, so that when setting the devices in the required position for starting the alarm, the section U2 will be moved a short distance away from the section C. When said slide is moved in the other direction it will draw section C2 in toward section G.

The segmental slots h3 g in the escutcheon and sleeve-flange respectively are to give clearance for the slide K-that is, when said slide is in the position shown in Fig. l it will have space to move in slot h2. When it is in the contrary position, as shown in Fig. 5, the sleeve G may move without impediment from said slide.

To keep the slide K in any position in which it may be set, it may have a hinged handle, K3, (shown in Fig. 5,) which may be turned to either side to come in contact with spindletlange GtVl or plate 1I. Vhen turned to rest against the latter the device is set to ring the alarm on turning the knobvspindle, but vice versa when turned to rest against the flan ge G.

By clock-work mechanism 7 I mean any suitable form of gearing or appliance adapted to produce an alarm of some considerable dura-- tion-such as is effected by an alarm-clock, for example-and do not wish to be understood as claiming a striker which is operated directly from the knob-spindle, and which for every stroke requires a corresponding rotation or part rotation of said spindle. The mechanism that I employ and refer to is one which is let off or started by the rotation ot' the knob-spindle, and which therefore will continue sounding for some considerable time after said spindle has been turned and come to a state of rest, or which will make a number of strokes in quick succession before thevspindie is restored to its normal position.

What I claim as my invention is as followsr l. The combination, with a door-knob, ot' a clock-work mechanism for producingan alarm, such mechanism bcinglocated within the knob and adapted and designed to be started when the knob-spindle is turned and to continue ringing after such spindle has come to a state of rest, substantially as shown and described.

2. The combination, with a door-knob and clock-work located within the same and designed and adapted to produce an` alarm, of means, substantially as described, whereby the actuating devices can be set and be started when the knob-spindle is turned and locked to be inactive when such spindle is turned, the

valarm mechanism comprising spring-gearing,

which will continue in operation after said knob-spindle has been turned and come to a state of rest, substantially as shown and described.

3. The combination, with the escutcheon H, knob C, internal clock-work gearing, l), and spindle B, ot' sleeve Gr, slide K, step d2, and detent F, said parts being constructed and arranged for operation substantially as shown and described, whereby in one position of said slide the parts will be set to start an alarm when the knob-spindle is turned and in the other position such spindle may be turned and the alarm remain inactive.

et. In combination with knob G, made in two IOO IIS

sections, O' G2, the slide K, extended through In testimony that I claim the foregoing I said knob and forming a support for the movahave hereunto set my hand this 25th day of ble section G2, substantially as shown and do- October, 1881.

scribed. WILLIAM F. COOK. 5 5. In combination with slide K, the pivoted Witnesses:

looking-lever K3, substantially as shown and JOHN W. STEWARD,

described. S. J VAN STAVOREN. 

